Don’t dive straight into brainstorming session-begin by revealing and doubting your own boxes

The first step in the creative process entails identifying and doubting the current boxes and evaluating which one needs to reevaluate or replacement. Is there anything in the boxes that is irrelevant to the organization? 

For example, let's say we’re working with government contractors; we start by identifying some critical shared mental models that everyone held about how they worked with various government departments.